linux-kernel - [PATCH v6 06/12] remoteproc: mediatek: Extract remoteproc initialization flow

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Message-ID: <20230213033758.16681-7-tinghan.shen@mediatek.com>
Date:   Mon, 13 Feb 2023 11:37:52 +0800
From:   Tinghan Shen <tinghan.shen@...iatek.com>
To:     Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Tinghan Shen <tinghan.shen@...iatek.com>
CC:     <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v6 06/12] remoteproc: mediatek: Extract remoteproc initialization flow

This is the preparation for probing multi-core SCP. The remoteproc
initialization flow is similar on cores and is reuesd to avoid
redundant code.

The registers of config and l1tcm are shared for multi-core
SCP. Reuse the mapped addresses for all cores.

Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
---
 drivers/remoteproc/mtk_scp.c | 62 ++++++++++++++++++++++++------------
 1 file changed, 42 insertions(+), 20 deletions(-)

diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index b92274067522..6270c388727a 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -23,6 +23,13 @@
 #define MAX_CODE_SIZE 0x500000
 #define SECTION_NAME_IPI_BUFFER ".ipi_buffer"
 
+struct mtk_scp_of_regs {
+	void __iomem *reg_base;
+	void __iomem *l1tcm_base;
+	size_t l1tcm_size;
+	phys_addr_t l1tcm_phys;
+};
+
 /**
  * scp_get() - get a reference to SCP.
  *
@@ -854,7 +861,8 @@ static void scp_remove_rpmsg_subdev(struct mtk_scp *scp)
 	}
 }
 
-static int scp_probe(struct platform_device *pdev)
+static int scp_rproc_init(struct platform_device *pdev,
+			  struct mtk_scp_of_regs *of_regs)
 {
 	struct device *dev = &pdev->dev;
 	struct device_node *np = dev->of_node;
@@ -878,6 +886,11 @@ static int scp_probe(struct platform_device *pdev)
 	scp->data = of_device_get_match_data(dev);
 	platform_set_drvdata(pdev, scp);
 
+	scp->reg_base = of_regs->reg_base;
+	scp->l1tcm_base = of_regs->l1tcm_base;
+	scp->l1tcm_size = of_regs->l1tcm_size;
+	scp->l1tcm_phys = of_regs->l1tcm_phys;
+
 	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "sram");
 	scp->sram_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(scp->sram_base))
@@ -887,24 +900,6 @@ static int scp_probe(struct platform_device *pdev)
 	scp->sram_size = resource_size(res);
 	scp->sram_phys = res->start;
 
-	/* l1tcm is an optional memory region */
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
-	scp->l1tcm_base = devm_ioremap_resource(dev, res);
-	if (IS_ERR(scp->l1tcm_base)) {
-		ret = PTR_ERR(scp->l1tcm_base);
-		if (ret != -EINVAL) {
-			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
-		}
-	} else {
-		scp->l1tcm_size = resource_size(res);
-		scp->l1tcm_phys = res->start;
-	}
-
-	scp->reg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
-	if (IS_ERR(scp->reg_base))
-		return dev_err_probe(dev, PTR_ERR(scp->reg_base),
-				     "Failed to parse and map cfg memory\n");
-
 	ret = scp->data->scp_clk_get(scp);
 	if (ret)
 		return ret;
@@ -932,7 +927,6 @@ static int scp_probe(struct platform_device *pdev)
 	ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0), NULL,
 					scp_irq_handler, IRQF_ONESHOT,
 					pdev->name, scp);
-
 	if (ret) {
 		dev_err(dev, "failed to request irq\n");
 		goto remove_subdev;
@@ -956,6 +950,34 @@ static int scp_probe(struct platform_device *pdev)
 	return ret;
 }
 
+static int scp_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct mtk_scp_of_regs scp_regs;
+	int ret;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
+	scp_regs.reg_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(scp_regs.reg_base))
+		return dev_err_probe(dev, PTR_ERR(scp_regs.reg_base),
+				     "Failed to parse and map cfg memory\n");
+
+	/* l1tcm is an optional memory region */
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "l1tcm");
+	scp_regs.l1tcm_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(scp_regs.l1tcm_base)) {
+		ret = PTR_ERR(scp_regs.l1tcm_base);
+		if (ret != -EINVAL)
+			return dev_err_probe(dev, ret, "Failed to map l1tcm memory\n");
+	} else {
+		scp_regs.l1tcm_size = resource_size(res);
+		scp_regs.l1tcm_phys = res->start;
+	}
+
+	return scp_rproc_init(pdev, &scp_regs);
+}
+
 static int scp_remove(struct platform_device *pdev)
 {
 	struct mtk_scp *scp = platform_get_drvdata(pdev);
-- 
2.18.0